AfriGeneas Creole Research Forum

Need help with a Ancestral Mystery

I am trying to locate where an ancestor would have been burial in 1809 in the city of New Orleans. I attempting to locate the site of the grave. I discovered on the burial certificate written, St Louis church cemeteries in New Orleans. Where is this located? Would that be the one called St Louis Nr# 1, 2, or 3. Is there a history of these graves the would cover the period of (1809-1810)